Ultrasonic air-in-line detector



FIG. 1 is a top plan view of an ultrasonic air-in-line detector showing our new design, the bottom plan view being identical;

FIG. 2 is a front elevational view;

FIG. 3 is a top, front and left side perspective view, the right side perspective view being identical;

FIG. 4 is a top, front and left side perspective view, the ultrasonic air-in-line detector now separated; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for an ultrasonic air-in-line detector, as shown. 